![]() The pixels in these TVs emit their own light when electricity passes through, as opposed to relying on a backlight for brightness. OLED (Organic Light-Emitting Diode) TVs have a more complex system. If you combine this with high dynamic range, you can get better screen resolution because of the contrast of colours. An LED television uses a backlight and turns off areas of light during dark scenes. ![]() The brightness of the TV screen depends on whether it is an LED, OLED or QLED device. To clear up any confusion, the below is a hierarchy of TVs, ranked from the best picture quality to the worst: You may see other terms when researching a TV, such as “Full HD” and “HD Ready”. Nearly all of these models have the ability to ‘upscale’ standard HD content, and premium 4K models might include HDR (High Dynamic Range), a contrast-boosting system that makes colours more vivid on the screen. Until 8K becomes more mainstream it’s best to stick to 4K TVs. Very little entertainment is being broadcast in 8K yet. However, there are only a handful of 8K models on the market thus far, and they are both very large and very expensive. In general, you should aim for a 4K television, as they are the highest-quality – aside from the 8K televisions. This means you get a crisper picture on the screen. The picture on a 4K or Ultra HD screen is made up of eight million pixels, which is four times as many as the picture on an HD TV. The term 4K refers to ultra high-definition picture quality, and is interchangeable with the term Ultra HD (or UHD on some models). Picture quality: What is 4K and Ultra HD? You should not have to tilt your head any more than 15 degrees upwards or downwards, or 40 degrees to the left or right. The screen should be parallel with your eyes. Remember, this is the distance from the bottom left to the top right of the screen, not its width. As such, Telegraph tech writer Jack Rear recommends going for a TV that’s at least 55 inches. While bigger isn’t always better, it’s worth noting that manufacturers often reserve their premium technology, such as OLED and QLED (see below) for larger screen sizes. What to look for when buying a TV Screen size
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